class ProviderViewModel extends  Cesium.ProviderViewModel{
	constructor(options) {
		super(options);
		this._layer=options.layer;
		this._layers=options.layers;
	}
	set layer(layer){
		this._layer=layer;
	}
	get layer(){
		return this._layer;
	}
	set layers(layer){
		this._layers=layers;
	}
	get layers(){
		return this._layers;
	}
}
export {ProviderViewModel};